<template>
  <div class="page">
    <header class="page__header">
      <div class="page-actions">
        <div style="border-right:1px solid #c5c5c5;cursor: pointer;" @click="exit">
          <i class="el-icon-arrow-left"></i>
        </div>
        <div>{{ title }}</div>
      </div>
      <div class="step-tab">
        <div
          v-for="(item, index) in steps"
          :key="index"
          class="step"
          :class="[activeStep==item.key?'active':'']"
          @click="changeSteps(item)"
        >
          <!-- <span class="step-index">{{index+1}}</span> -->
          {{item.label}}
        </div>
        <div class="ghost-step step" :style="{transform: translateX}">12</div>
      </div>
      <el-button size="small" class="publish-btn" @click="publish">发布</el-button>
    </header>
    <section class="page__content" v-if="mockData">
      <Process  
        ref="processDesign"
        :conf="mockData.processData"
        tabName="processDesign" 
        v-show="activeStep === 'processDesign'" 
        @startNodeChange="onStartChange"/>
    </section>
  </div>
</template>

<script>
// @ is an alias to /src
import Process from "@/components/FlowProcess";
import { GET_MOCK_CONF } from '../api/index'
const beforeUnload = function (e) {
  var confirmationMessage = '离开网站可能会丢失您编辑得内容';
  (e || window.event).returnValue = confirmationMessage;     // Gecko and Trident
  return confirmationMessage;                                // Gecko and WebKit
}

export default {
  name: "Home",
  props: {
    title: {
      type: String,
      default: '补卡申请'
    }
  },
  data() {
    return {
      mockData: null, // 可选择诸如 $route.param，Ajax获取数据等方式自行注入
      activeStep: "processDesign", // 激活的步骤面板
      steps: [
        //{ label: "基础设置", key: "basicSetting" },
        //{ label: "表单设计", key: "formDesign" },
        { label: "流程设计", key: "processDesign" },
        //{ label: "高级设置", key: "advancedSetting" }
      ]
    };
  },
  beforeRouteEnter(to, from, next){
    window.addEventListener('beforeunload', beforeUnload)
    next()
  },
  beforeRouteLeave(to, from, next){
    window.removeEventListener('beforeunload', beforeUnload)
    next()
  },
  computed:{
    translateX () {
      return `translateX(${this.steps.findIndex(t => t.key === this.activeStep) * 100}%)`
    }
  },
  mounted() {
    GET_MOCK_CONF().then(data => this.mockData = data);
  },
  methods: {
    changeSteps(item) {
      this.activeStep = item.key;
    },
    publish() {
      const getCmpData = name => this.$refs[name].getData()
      // basicSetting  formDesign processDesign 返回的是Promise 因为要做校验
      // advancedSetting返回的就是值
      const p3 = getCmpData('processDesign')
      Promise.all([p3])
      .then(res => {
        const param = {
          processData: res[0].formData,
        }
        this.sendToServer(param)
      })
      .catch(err => {
        err.target && (this.activeStep = err.target)
        err.msg && this.$message.warning(err.msg)
      })
    },
    sendToServer(param){
      this.$notify({
        title: '数据已整合完成',
        message: '请在控制台中查看数据输出',
        position: 'bottom-right'
      });
      console.log('配置数据', param)
    },
    exit() {
      this.$confirm('离开此页面您得修改将会丢失, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          this.$message({
            type: 'success',
            message: '模拟返回!'
          });
        }).catch(() => { });
    },
    /**
     * 同步基础设置发起人和流程节点发起人
     */
    onInitiatorChange (val, labels) {
      const processCmp = this.$refs.processDesign
      const startNode = processCmp.data
      startNode.properties.initiator = val['dep&user']
      startNode.content =  labels  || '所有人'
      processCmp.forceUpdate()
    },
    /**
     * 监听 流程节点发起人改变 并同步到基础设置 发起人数据
     */
    onStartChange(node){
      const basicSetting = this.$refs.basicSetting
      basicSetting.formData.initiator = { 'dep&user': node.properties.initiator }
    }
  },
  components: {
    Process
  }
};
</script>
<style lang="stylus" scoped>
$header-height = 54px;
.page {
  width: 100%;
  height: 100%;
  padding-top: 0px;
  box-sizing: border-box;

  .page__header {
    height: $header-height;
    flex-center()
    justify-content: space-between;
    box-sizing: border-box;
    color: white;
    background: #3296fa;
    font-size: 14px;
    .page-actions {
      height: 100%;
      text-align: center;
      line-height: $header-height;

      > div {
        height: 100%;
        padding-left: 20px;
        padding-right: 20px;
        display: inline-block;
      }

      i {
        font-size: 22px;
        vertical-align: middle;
      }
    }

    .step-tab {
      display: flex;
      justify-content: center;
      height: 100%;
      position: relative;

      >.step {
        width: 140px;
        line-height: $header-height;
        padding-left: 30px;
        padding-right: 30px;
        cursor: pointer;
        position: relative;

        &.ghost-step{
          position: absolute;
          height: $header-height;
          left: 0;
          z-index: -1;
          background: #4483f2;
          transition: transform .5s;

          &::after {
            content: '';
            border-width: 6px 6px 6px;
            border-style: solid;
            border-color: transparent transparent white;
            position: absolute;
            bottom: 0;
            left: 50%;
            margin-left: -6px;
          }
        }

        &.active >.step-index  {
          background: white;
          color: #4483f2;
        }

        >.step-index {
          display: inline-block;
          width: 18px;
          height: 18px;
          border: 1px solid #fff;
          border-radius: 8px;
          line-height: 18px;
          text-align: center;
          box-sizing: border-box;
        }
      }
    }
  }

  .page__content {
    width: 100%;
    height: 100%;
    overflow: hidden;
    box-sizing: border-box;
    background #f5f5f7
  }
}

.publish-btn {
  margin-right: 20px;
  color: #3296fa;
  padding: 7px 20px;
  border-radius: 4px;
  font-size: 14px;
}

.github{
  position fixed
  bottom 10px
  left 20px
}
</style>
